iT'S TO DO WITH PEOPLE ON BENEFITS, i UNDERSTAND, (Oops sorry)
It's not been fully sorted out yet - everybody's a bit confused!
21 February 2012 Last updated at 17:30
The Bill has been back and forth between the two Houses of Parliament MPs have voted to overturn Lords' call for changes to the controversial plans for a so-called "bedroom tax", which is part of the Welfare Reform Bill.
The bill is "ping ponging" between the two Houses of Parliament, after peers inflicted a series of defeats on the plans for England, Scotland and Wales.
Most of the defeats were overturned but one area of disagreement remains.
Peers still want to limit cuts to payments to social housing tenants in homes deemed bigger than their needs.
The government wants its new Universal Credit - which would be introduced by the bill from 2013 - to include an "under-occupancy" penalty for council and housing association tenants, who are considered to have more rooms than they need. Currently they are allowed to have one spare bedroom.
Those judged to have one extra bedroom would lose 14% of housing benefit a week, those with two or more extra rooms would lose 25%, if they do not move to a smaller property. Critics call it the "bedroom tax".